Plate-valve lifter



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c. w. METZGAR PLATE VALVE LIFTER Filed May 20. 1922 @MQ MW Patented June12, 1923.

UNITED STATES 1,458,625 PATENT' OFFICE..

CHESTER W. METZGAR, F EASTON, PENNSYLVANIA, ASSIGNOR T0`INGIZIR'SOLL-RAND COMPANY, OF JERSEYCITY, NEW JERSEY, A CORPORATION OFNEW JERSEY.

PLATE-VALVE LIFTER.

Application led May 20, 1922. Serial No. 562,373.

To all whom t may concern.:

Be it known that I, CHESTER WV. ME'rzGAR, a citizen of the UnitedStates', and a resident of Easton, county of Northampton, and State ofPennsylvania, have invented a certain Plate-Valve Lifter, of which thefollowing is a Specification accompanied by drawings. Y

This invention relates to plate valves, but more particularly to a platevalve lifter for compressor valves, by means of `which a plate valve andits associated parts may be lifted from its seat when desired andreadily replaced.

he objects of the invention are to secure a simple and eiiicient devicewhich will not readily get out of order for lifting the plate valvestructure from its seat when required,

' and to construct the device in such manner that it maybe applied toany existing type of well known plate valves.

Tothese ends the invention is shown in one of its preferred forms intheaccompanying drawing, which is a side elevation partly in lon itudinalsection of a plate valve lifter em dying the invention. y

Referring to the drawings, the plate valve shown for purposes ofillustration includes a valve seat A, a stop plate B, la valve plate Cand a stud D and nut E for holding the parts together. The plate valveneed not be further described since the invention may be applied toany'suitable valve. The plate valve structure, including the partsindicated, is ada ted to lie in a valve opening F in the cylinder wall Gof a' compressor. A valve stem yoke H is arranged over the valve seat Aand a valveholder, preferably in the form of a iiat leaf spring Jengages 40 both thestud D and the valve stem yoke H for holding thevalve structure to the yoke.

In this instance, the spring J is held on the stud D by means of thecastle nut K and cotter pin L, while the ends' of the spring bear uponthe yoke H.

A bonnet O "s adapted to be secured (by means not shown) to thecompressor outer casing P opposite the valve opening Fand a valve stem Qis movable in said bonnet. In this instance the stem Q is provided witha threaded portion R threaded into a portion of the bonnet. The end ofthe stem Q is As the stem formed with an4 enlargement S en ged by a locknut T threaded to the end Il of the yoke H, and a lock plate V locks thenutv T in position. Theouter end of the stem Q passes through thepacking W andgland X and is provided with a hand wheel Y for rotatingthe stem.

Q is rotated by the hand wheel Y, the plate valve structure will belifted from itsseat or replaced thereon, as

the case may be.

I claim:

1. A plate valve lifter, comprising a plate valve including its seat,stop plate and stud adapted to lie in a valve opening in the cylinderwall of a compressor, a valve stem yoke over the valve` seat, a valveholder for holding the plate valve and its associated parts to the yoke,a bonnet adapted to besecured to the compreor outer casing opposite thesaid valve opening, a valve stem carried by said bonnet and connected tothe valve stem yoke, and means for actuating said stem to lift the platevalve and its associated parts. l

2. A p ate valve lifter, comprising a plate valve includin its seat,stop plate'and stud adapted .to lie 1n a valve openlng inthe cylinderwall of a compressor,` a valve stem yoke over the valve seat, a valveholder engaging the valve stud and the said yoke, a bonnet adapted to besecured to the compressor outer casingopposite the said valve opening, avalve stem movable in said bonnet and 'engaging the said yoke, and meansfor actuating the said stem to lift the plate valve and its associatedparts'.

3. A plate valve lifter, comprisinga plate valve including its seat,stop plate and stud adapted to lie in a valve open-ing in the cylvinderwall of a compressor, a valve stem yoke over the valve seat,a valveholder in the form of a at spring engaging the valve stud and the saidyoke, a bonnet adapted to be secured to the compressor outer casingopposite the .said valve openin a valve stema movable 1n said bonnet anengagin the said yoke, and means for actuating t e said stem to lift theplate valve and 1ts aociated parts. i

In testimony whereof I have signed this specification.

CHESTER W. METZGAR.

